Heat exchanger



DC- 16, 1941- VF. M. YONG f 2,266,291

` `HEAT EXCHANGER Filed Jani. 16, 1959 QBY A r roRN/SY Patented Dec. 16,1941 UNITED STAT OFFICE I .nas'rnxcnANGi-:a

Fred M. Young, Racine, Wis. .Application January 16,-1939, serial No.251,076 Y `1 claim. (01.257-144) The present application is a'continuation in part of my application Serial No. 735,999, filed Y July19, 1934.

An object of the present invention is to provide a heat exchangeradapted to occupy the horizontal space in a vertically positionedhousing and havingtwo separate cores operatively connected together atone end by a single header,

the other ends each having individual headers,

one being positioned above the horizontal plane of the single header andthe Aother `below the horizontal plane of the single header, the upperheader of the `pair of Vheaders having an inlet connection and the lowerheader of the pair of headers having an outlet connection whereby liquidmay iiow from the inlet header to the outlet header by gravity.

A further object of the present invention is to provide a connectionbetween the inner ends of the pair of headers adapted to permitindependent expansionr and contraction of the separateV banks of tubesbut prevent the headers from moving longitudinally or vertically rela--improved heatA exe core diverge 'from header I4 as clearly indicated inFigures l4 and 5. Headers Il and I1 are on a horizontal line positioneda distance apart vertically` preferably equal to about the width of aheader as indicated in Figures 2 and 3.

Headers I6 and I1 are providedwith inlet and outlet openings 20 and 2|,which are positioned preferably at'the outer 'ends ofthe headers. Y i

Thus a heating or cooling liquid or gas may enter at 20, pass throughone core, then through header Il and return through the lother core tooutlet 2l. The .pathis thusequalized for the passage of the heatingorrcooling medium and the cores may expand and contract individually.

'I'hus it will be seen that the heating or coolingv medium orcondensate'may drain downwardly `through all of the tubes.

One ofthe novel features headers IB and I1 are tied together by meansofspaced apart ears 22 and 23 and bolt 24.

Thus Vwhile the separate banks of tubes may expand in a directionparallel to the tubes, they will be anchored against individualtransverse or verticalmovement by headers I6 and I'I.v The unittherefore will be practically as strong as if headers I 6 andilwere'made integral,L

side plates which. are adapted torcooperate with the headers to form aframe.

My improved heat exchanger when completed, K

forms a. strong, compact, unitary'structure which may be easilyinstalled at the Iactoryfcrated and shipped individually to the place ofinstallation and easily installed in the cabinet or air duct.

My device comprises two separate 'banks of Y tubes YI2 and I28L having amultiplicity of closely spaced strip fins I3 and I3* through which thetubes extend forming separate cores. Y

I provide a single header I4, long enough to receive the ends of tubesI2 and I2. This header is preferably provided with a flange I5, withwhich to attach the end of the unit to the wall of the cabinet.

Each core at the individual headers I6 and other end is provided withI'I. The tubes of each In order to provide protection for the fin edgesVI provide -side plates :'25, which are attached to the headersV as at26, by means of drive screws. 21. The screw openings in these plates areelongated as at 28. Thus after the'cores are completed the plates may beeasily attached because provisionV is made for slight variations inthedistance between headers, and further,

after the unit is putin service the oblongholes 28; will Vprovide forslight unequal expansion between the tubes and plates. A

Header I4 may be rigidly ysecured to one wall ofthe duct or cabinet.Headers I8 and I1 areV preferably secured to theopposite wall of thecabinet so they are free to move longitudinally of the tubes.

One of the advantages of my advice is that it may be handled withoutdanger of injuring the tubes before being installed in the cabinetYbecause the pair of headers is secured together. Otherwise if oneshould lift one end ot the deviceVK by one of the pair of headers only,the weight of the other header and its tubes might injure the tubes. Inthis connection, it will be noted that the cores may consist of but asingle row of tubes andtherefore they are-not very rigid.

Clearly many minor detail changes may he 5 made without departing fromthe spuit and scope of my device is that oi the present invention asrecited in the pended claim.

Having thus shown and described my invention, I claim:

A device of the class described. comprising an elongated horizontallypositioned header, a pair l of headers spaced a distance from andarranged in parallel relation with each other and with said rst header,their inner ends beingy in juxtaposition, said pair of headers having acombined length about equal to said first header, one of said pair ofheaders being positioned somewhat above and the other somewhat below thehorizontal plane of said first header, rows of substantially straighttubes forming operating connections between said nrst and said pair ofheaders, closely spaced ns through which said tubes extend forming twoseparate cores whereby the tubes of one core incline downwardly from oneo! said headers of said pair of headers to` said rst header and thetubes oi' the other core incline downwardly from said ilrst header tothe other of said pair of headers, an inlet connection in the `upperheader of said pair oi' headers and an outlet connection in the lowerheader of said pair of headers whereby a. liquid may 110W by gravityfrom said inlet to said outlet, said pair of headers having a connectiontherebetween adapted to permit independent expansion and contraction ofsaid cores but prevent the headers of said pair of headers from movingvertically or longitudinally relative to each other.

FRED M. YOUNG.

